Transparent QWidget over a QGLWidget

[NIXIN]

I am trying to have a transparent QWidget over a QGLWidget something like below:

QWidget *transparentWidget = new QWidget;
transparentWidget->setFixedSize(1440, 720);
transparentWidget->setAttribute(Qt::WA_TranslucentBackground);

QGLWidget *glWidget  = new QGLWidget;
transparentWidget->setParent(glWidget);
transparentWidget->setGeometry(10, 50, 500, 500);

transparentWidget->show();
glWidget->show();

But I am not getting the desired result. transparentWidget is being added at the specified geometry, however it is not transparent.

How can I fix this??

Any leads would be appreciated....

[Alain38 0]

Hi,
Combine the setAttribute(Qt::WA_TranslucentBackground) with setWindowOpacity

[JKSH]

Also, if you are on Qt 5.4 or newer, I suggest replacing QGLWidget with QOpenGLWidget. QOpenGLWidget resolves numerous issues with QGLWidget: https://blog.qt.io/blog/2014/09/10/qt-weekly-19-qopenglwidget/